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THREATINT
PUBLISHED

CVE-2021-47558

net: stmmac: Disable Tx queues when reconfiguring the interface



Description

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Disable Tx queues when reconfiguring the interface The Tx queues were not disabled in situations where the driver needed to stop the interface to apply a new configuration. This could result in a kernel panic when doing any of the 3 following actions: * reconfiguring the number of queues (ethtool -L) * reconfiguring the size of the ring buffers (ethtool -G) * installing/removing an XDP program (ip l set dev ethX xdp) Prevent the panic by making sure netif_tx_disable is called when stopping an interface. Without this patch, the following kernel panic can be observed when doing any of the actions above: Unable to handle kernel paging request at virtual address ffff80001238d040 [....] Call trace: dwmac4_set_addr+0x8/0x10 dev_hard_start_xmit+0xe4/0x1ac sch_direct_xmit+0xe8/0x39c __dev_queue_xmit+0x3ec/0xaf0 dev_queue_xmit+0x14/0x20 [...] [ end trace 0000000000000002 ]---

Reserved 2024-05-24 | Published 2024-05-24 | Updated 2024-12-19 | Assigner Linux

Product status

Default status
unaffected

0366f7e06a6bee7eace3946a6b67fb88b828bc5c before a92f0eebb8dc008b9e8c51c6f7b8c93b27a29a43
affected

0366f7e06a6bee7eace3946a6b67fb88b828bc5c before b270bfe697367776eca2e6759a71d700fb8d82a2
affected

Default status
affected

5.10
affected

Any version before 5.10
unaffected

5.15.6
unaffected

5.16
unaffected

References

git.kernel.org/...c/a92f0eebb8dc008b9e8c51c6f7b8c93b27a29a43

git.kernel.org/...c/b270bfe697367776eca2e6759a71d700fb8d82a2

cve.org (CVE-2021-47558)

nvd.nist.gov (CVE-2021-47558)

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